Frequencies for first 10,000 rows of county variable in accident dataset :

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        357        3.57        3.57
          2 |          1        0.01        3.58
          3 |        217        2.17        5.75
          5 |        164        1.64        7.39
          7 |        103        1.03        8.42
          9 |        186        1.86       10.28
         11 |        176        1.76       12.04
         12 |         13        0.13       12.17
         13 |        468        4.68       16.85
         15 |        136        1.36       18.21
         17 |         99        0.99       19.20
         19 |        327        3.27       22.47
         20 |         34        0.34       22.81
         21 |        117        1.17       23.98
         23 |         63        0.63       24.61
         25 |        335        3.35       27.96
         27 |         63        0.63       28.59
         28 |          1        0.01       28.60
         29 |        198        1.98       30.58
         31 |        163        1.63       32.21
         33 |         76        0.76       32.97
         35 |         68        0.68       33.65
         37 |      1,176       11.76       45.41
         39 |         53        0.53       45.94
         41 |         84        0.84       46.78
         43 |         49        0.49       47.27
         45 |         63        0.63       47.90
         46 |          1        0.01       47.91
         47 |         75        0.75       48.66
         49 |         32        0.32       48.98
         51 |         51        0.51       49.49
         53 |         99        0.99       50.48
         55 |         60        0.60       51.08
         57 |        181        1.81       52.89
         59 |        302        3.02       55.91
         61 |         82        0.82       56.73
         63 |         38        0.38       57.11
         65 |        317        3.17       60.28
         67 |        168        1.68       61.96
         69 |        101        1.01       62.97
         70 |          1        0.01       62.98
         71 |        451        4.51       67.49
         73 |        488        4.88       72.37
         75 |         95        0.95       73.32
         77 |        151        1.51       74.83
         79 |         58        0.58       75.41
         81 |        102        1.02       76.43
         83 |        117        1.17       77.60
         85 |        171        1.71       79.31
         87 |         61        0.61       79.92
         89 |         91        0.91       80.83
         90 |          2        0.02       80.85
         91 |         32        0.32       81.17
         93 |         58        0.58       81.75
         95 |        170        1.70       83.45
         97 |        153        1.53       84.98
         99 |        184        1.84       86.82
        100 |          3        0.03       86.85
        101 |        142        1.42       88.27
        103 |        129        1.29       89.56
        105 |         95        0.95       90.51
        107 |        128        1.28       91.79
        109 |         45        0.45       92.24
        110 |          2        0.02       92.26
        111 |        111        1.11       93.37
        113 |         56        0.56       93.93
        115 |         76        0.76       94.69
        117 |         55        0.55       95.24
        119 |         68        0.68       95.92
        121 |         39        0.39       96.31
        122 |         13        0.13       96.44
        123 |         60        0.60       97.04
        125 |         61        0.61       97.65
        127 |         86        0.86       98.51
        129 |         16        0.16       98.67
        130 |          3        0.03       98.70
        131 |         27        0.27       98.97
        133 |         19        0.19       99.16
        135 |          3        0.03       99.19
        139 |          9        0.09       99.28
        141 |          5        0.05       99.33
        143 |         16        0.16       99.49
        145 |         11        0.11       99.60
        147 |          1        0.01       99.61
        149 |          4        0.04       99.65
        150 |          1        0.01       99.66
        151 |          1        0.01       99.67
        170 |         13        0.13       99.80
        185 |          1        0.01       99.81
        201 |          3        0.03       99.84
        240 |          6        0.06       99.90
        261 |          5        0.05       99.95
        270 |          1        0.01       99.96
        290 |          3        0.03       99.99
        997 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016